storage/maria/unittest/ma_test_recovery.pl:
  Perl magic does something unexpected with $suffix is ""

- one which led REDO_INSERT_ROW_BLOBS to fail to apply
- one excess close ("-1 file left open")
Don't need maria-path option / environment variable.
Fixes for ma_test_all-t to run under Windows.
Port of ma_test_recovery to Perl, written by Jani.


storage/maria/unittest/ma_test_recovery.expected:
  Rename: storage/maria/ma_test_recovery.expected -> storage/maria/unittest/ma_test_recovery.expected
mysys/my_pread.c:
  Fix for Windows-specific bug (maria_read_log -a failed during
  ma_test_all-t): Windows does not have pread() so the branch setting
  HA_ERR_FILE_TOO_SHORT was not compiled in, broke applying of
  REDO_INSERT_ROW_BLOBS. After fixing that, it appeared that in my
  Windows machine, errno is not changed in case of EOF; as we read it
  we have to reset it at start.
  The changed to readbytes!=-1 is to detect EOF
mysys/my_read.c:
  The change to readbytes!=-1 is to detect EOF
storage/maria/ma_loghandler.c:
  Fix for Windows-specific bug: as we don't open the directory
  we should not close it.
storage/maria/ma_page.c:
  This is C, cannot declare variable after instruction.
storage/maria/ma_test_recovery:
  ma_test_recovery.expected moved
storage/maria/unittest/ma_test_all-t:
  Can now safely guess maria_path so don't need the command-line option
  or environment variable. Port to Windows (.exe, different locations
  of executables); can guess suffix, don't need --suffix.
storage/maria/unittest/ma_test_recovery.pl:
  Perl version of ma_test_recovery, written by Jani. Will deprecate the
  shell version.